diff --git a/src/engine/target.js b/src/engine/target.js
index 9af14990f..0f1895a3c 100644
--- a/src/engine/target.js
+++ b/src/engine/target.js
@@ -330,7 +330,7 @@ class Target extends EventEmitter {
                             blockUpdated = t.blocks.updateSensingOfReference(
                                 oldName,
                                 newName,
-                                this.isStage ? '__stage__' : this.getName()
+                                this.isStage ? '_stage_' : this.getName()
                             ) || blockUpdated;
                         });
                         // Request workspace change only if sensing_of blocks were actually updated.